/******************************************************************************

* tif_ovrcache.h,v 1.3 2005/05/25 09:03:16 dron Exp

*

* Project: TIFF Overview Builder

* Purpose: Library functions to maintain two rows of tiles or two strips

* of data for output overviews as an output cache.

* Author: Frank Warmerdam, warmerdam@pobox.com

*

* This code could potentially be used by other applications wanting to

* manage a once-through write cache.

*

******************************************************************************

* Copyright (c) 2000, Frank Warmerdam

*

* Permission is hereby granted, free of charge, to any person obtaining a

* copy of this software and associated documentation files (the "Software"),

* to deal in the Software without restriction, including without limitation

* the rights to use, copy, modify, merge, publish, distribute, sublicense,

* and/or sell copies of the Software, and to permit persons to whom the

* Software is furnished to do so, subject to the following conditions:

*

* The above copyright notice and this permission notice shall be included

* in all copies or substantial portions of the Software.

*

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

* DEALINGS IN THE SOFTWARE.

******************************************************************************

*/

#ifndef TIF_OVRCACHE_H_INCLUDED

#define TIF_OVRCACHE_H_INCLUDED

#include "tiffio.h"

#if defined(__cplusplus)

extern "C" {

#endif

typedef struct

{

uint32 nXSize;

uint32 nYSize;

uint16 nBitsPerPixel;

uint16 nSamples;

uint16 nPlanarConfig;

uint32 nBlockXSize;

uint32 nBlockYSize;

toff_t nBytesPerBlock;

toff_t nBytesPerRow;

int nBlocksPerRow;

int nBlocksPerColumn;

int nBlockOffset; /* what block is the first in papabyBlocks? */

unsigned char *pabyRow1Blocks;

unsigned char *pabyRow2Blocks;

toff_t nDirOffset;

TIFF *hTIFF;

int bTiled;

} TIFFOvrCache;

TIFFOvrCache *TIFFCreateOvrCache( TIFF *hTIFF, toff_t nDirOffset );

unsigned char *TIFFGetOvrBlock( TIFFOvrCache *psCache, int iTileX, int iTileY,

int iSample );

unsigned char *TIFFGetOvrBlock_Subsampled( TIFFOvrCache *psCache, int iTileX, int iTileY );

void TIFFDestroyOvrCache( TIFFOvrCache * );

void TIFFBuildOverviews( TIFF *, int, int *, int, const char *,

int (*)(double,void*), void * );

void TIFF_ProcessFullResBlock( TIFF *, int, int, int, int, int, int *, int,

int, TIFFOvrCache **, uint32, uint32,

unsigned char *, uint32, uint32,

int, const char * );

uint32 TIFF_WriteOverview( TIFF *, uint32, uint32, int, int, int, int, int,

int, int, int, int, unsigned short *,

unsigned short *, unsigned short *, int,

int, int);

#if defined(__cplusplus)

}

#endif

#endif /* ndef TIF_OVRCACHE_H_INCLUDED */

/*

* Local Variables:

* mode: c

* c-basic-offset: 8

* fill-column: 78

* End:

*/